Oh of course! It'd be quite odd to me as well if all of the Gen III Pokemon in these games were to be given an evolution! Going by that logic, there would be a Crawdaunt evo (assuming that Crawdaunt is in these games which is pretty likely for the most part), and I'm not entirely sure how I'd feel about that, though I'm sure it might come across as strange to some.
Aside from that though, I'm fine if there's a large amount of Hoenn Pokes with not many evos this time around. At least we finally get a game that recognizes Hoenn and it's Pokemon, something that arguably long overdue.